Portsmouth midfielder Hayden Mullins reckons they can upset Chelsea in the FA Cup thanks to their dressing room unrest.

Mullins insists there is no pressure on Pompey, still cash-strapped but now a modest mid-table Championship club.

Mullins said: "A draw or a loss for ­Chelsea against us will be a major disaster, ­especially the run they are on at home.

"There's no pressure on us whatsoever so we can go out and enjoy playing our game and hopefully getting a positive result.

"The recent run is not like them but I'm sure they'll bounce back.

"The new manager is ­trying to put his ideas across and a few players want to leave. But as an outsider ­looking in it seems as though there is a little ­unrest in the camp.

"Even so we know that they are a ­quality side and we know what they can do, so it is still going to be tough for us."